PDF malware analysis — malicious · 24ebf413ca62e195

MALICIOUS

PDF

8.6 KB

MD5: 1dd7ab9d8395a5484795e12a4e28465b SHA-1: 608b6854d2ce66bb4d1addc36b640c47be9e6469 SHA-256: 24ebf413ca62e1956037c170da46d5441547dd0ea38940dbe57a5f9928259ce7

94 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF document contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. The critical CVE_2007_5659 firing specifically points to the use of the Collab.collectEmailInfo method to decode and execute JavaScript. This suggests the document is designed to exploit this vulnerability to run malicious code. The extracted JavaScript files, such as numeric_charcode_stage_000.js, likely contain the payload or further stages of execution.

Heuristics 6

Collab.collectEmailInfo — CVE-2007-5659 critical CVE exact CVE_2007_5659

PDF JavaScript calls Collab.collectEmailInfo — CVE-2007-5659 is a buffer overflow in Adobe Reader triggered by a long argument or heap-sprayed message field passed to Collab.collectEmailInfo(). Part of a series of Acrobat JS API exploits. (identified after JavaScript deobfuscation)
JavaScript action low PDF_JAVASCRIPT

PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
String.fromCharCode low PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape rules. (matched inside decoded stream)
syncAnnotScan annotation-staging primitive low PDF_FOXIT_SYNCANNOTSCAN

PDF JavaScript calls syncAnnotScan() — a no-op annotation-enumeration primitive used by exploit-kit JavaScript to stage payload reads from annotation /Subject fields before eval(). Not a vulnerable sink itself; rarely seen in legitimate PDFs. (identified after JavaScript deobfuscation)
Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE

One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0004_000.js` `8b70e431ed36d84945464549cd8184fb5a7cf6ee13d19263f40a1485872c8893`	pdf-javascript-stream	PDF /JS object 4 at offset 0xE1	2105 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`numeric_charcode_stage_000.js` `9d5c7e01faed5b04e9ec11f1d98b73f0012c871beaf60e9f9d32ad6df00d46f7`	deobfuscated-js	numeric char-code string decoded JavaScript at offset 0xEF	550 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_000.js` `c59c0c830f7cf16cf9f89fa70e2c8094b9238d71af214e212227942d5e19ef31`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x1CDE	1813 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_001.js` `9d3a2fc01abd1c7193e147e8f6710a99f60057da280b11dffad04da983b8f4c5`	deobfuscated-js	annotation-subject callee-key decoded JavaScript at offset 0x4D0	5189 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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